Submergible swimming pool change room



Oct. 19, 1965 M. H. BAKER ETAL 3,212,105

SUBMERGIBLE SWIMMING POOL CHANGE ROOM Filed Feb. l2, 1964 4 Sheets-Sheetl Oct. 19, 1965 M. H. BAKER ETAL 3,212,105

SUBMERG'IBLE SWIMMING POOL CHANGE ROOM 4 Sheets-Sheet 2 Filed Feb. l2,1964 4 Sheets-Sheet 3 M. H. BAKER ETAL SUBMERGIBLE SWIMMING POOL CHANGEROOM Oct. 19, 1965 Filed Febn 12,

UCL 19, 1965 M. H. BAKER ETAL 3,212,105

SUBMERGIBLE SWIMMING POOL CHANGE ROOM INVENTORS /WEQfp/rf/ 94A/EQ,H4/255 D. @OM/4x44 J4/W5S z/mp/ United States Patent O 3,212,105SUBMERGHBLE SWHMMENG PL CHANGE RN Meredith H. Baker, 6900 EastondaleAve., Long Beach, Calif.; Charles D. Thomason, Long Beach, Calif. (18321Gridley Road, Dairy Valley, Calif.); and .lames A. Bullard, Long Beach,Calif. (1312 S. Washington, Compton, Calif.)

Fiied Feb. 12., 1964, Ser. No. 344,564 1S Claims. (Cl. 4 1) Thisinvention relates to a combined change room and lavatory particularlyadapted to be positioned adjacent a swimming pool for the purpose ofproviding convenicnt and inexpensive lavatory and clothes changingfacilities for persons using the swimming pool.

During the past few years there has been a tremendous increase in thenumber of private swimming pool installations. One of the problemsassociated with private swimming pools which has not been satisfactorilysolved prior to the present invention is the lack of convenient,inexpensive, and practical lavatory and clothes changing facilities forthose using the swimming pool. As a result, guests, as well as the homeowner, must use the facilities within the home, thereby tracking indirt, dripping water, and causing in general a situation ofinconvenience to all concerned.

Furthermore, any lavatory or toilet facilities which might be providedfor use adjacent private swimming pools would normally involve thelaying of expensive sewer lines using expensive sewer pipe which wouldextend from the rear of the. house, where the swimming pool wouldnormally be located, to the front of the house where the sewerconnection is usually provided for the residence.

Also, any lavatory or clothes changing facilities which might beprovided adjacent a residential swimming pool would normally involve theprovision of a building construction which would be aestheticallyunpleasant and which would not blend harmoniously with the surroundinglandscape.

Accordingly, it is an object of this invention to provide a combinedlavatory and clothes changing room adapted to be installed adjacentprivate swimming pools and the like which is adapted for easy assemblyand installation at the desired site.

It is another object of the invention to provide a combined lavatory andchange room for installation adjacent swimming pools and the like whichis retractable into a well when not in use in such manner as to beimperceptible and to blend with the surrounding landscaping, and whichmay be elevated to an above ground position when in use.

It is another object of the invention to provide a combined lavatory andchange room for installation adjacent swimming pools and the like whichis movable from a retracted position beneath the ground level to anaboveground position by hydraulic notation means.

It is another object of the invention to provide a combined lavatory andchange room for installation adjacent swimming pools and the like whichprovides clothes changing, toilet, and shower facilities which eliminatethe need for using such facilities inside the residence.

It is a further object of the invention to provide a combined lavatoryand change room for installation adjacent private swimming pools whichutilizes inexpensive sewer piping connections to the nearest sewerstub-out.

Further objects and advantages of the invention will become apparentfrom the following description taken in conjunction with theaccompanying drawings in which FIG. l is a View partially in elevationand partially in ice section of a swimming pool change room and lavatoryin accordance with the invention;

FIG. 2 is a view taken substantially along line 2-2 of FIG. 1;

FIG. 3 is a view in elevation and partially in section showing theswimming pool lavatory and change room retracted into the well;

FG. 4 is a View in horizontal section along line 4-4 of FIG. 3;

FIG. 5 is a top plan view, partially schematic, of the change room andlavatory; and showing schematically the plumbing and electricalconnections for the change room;

FIG. 6 is a View, partially broken away, and partially in section,showing the iloat which controls energization of the sewage pump motorin response to sewage level;

FIG. 7 is a view in section showing the interlocking tongue-and-grooveconstruction of the sections of the change room;

FIG. 8 is a view, partially in elevation, and partially in section,showing details of the Wall construction of the change room.

In achievement of these objectives, there is provided in accordance withthis invention a combined swimming pool change room and lavatory,including a four-walled enclosure mounted upon a pontoon assembly andreceived in an excavated concrete-walled well. The change room ismovable to a retracted position in the well when water is withdrawn fromthe well by a pump located in a removable housing in the well, and ismoved by otation to an elevated above-ground position when the well isfilled to a predetermined level with water by opening a valve in thewater inlet line to the well. The change room also includes a roof whichis adapted to completely cover the upper end opening of the well whenthe change room is in its fully retracted position. The roof of thechange room is covered with tlagstone, plantings, or the like, in suchmanner that when the change room is in fully retracted position withinthe well the roof thereof blends imperceptibly with the swimming pooldecking or other area surrounding the swimming pool. The change room ismade of sectionalized construction to permit ease of transportation andassembly.

The change room is provided with toilet, washbowl, and showerfacilities, and flexible pipes connect the various plumbing devices topermanent hot and cold water inlets in the walls of the well. The sewageand drain water from the change room are drained into one of thepontoons. Pumping means responsive to the level of sewage in the pontoonis provided to pump the sewage and drain water through a flexible pipeto a sewage outlet in the well wall. The sewage and drain water thenpass through another ilexible pipe buried in a shallow trench to astub-out of the main sewer pipe. Means is also provided for force ushingthe lleXible sewer pipe.

Referring now to the drawings, and more particularly to FIG. l, thecombined change room and lavatory of the invention is generallyindicated at 10 and includes a front Wall 12 having a door 14 and awindow 16 therein, a rear wall 18, and left and right end walls 2@ andZ2 respectively. A screened Ventilating opening 29 is provided in endwall 22. The change room also includes a flat roof 23 made ofweatherproof plywood or other suitable material, and a iloor 24. Theroof 23 and floor 24 are each forme-d in two mating front and rearsections which are joined to each other by tongue-andgroove joints ofthe type shown joining floor sections 24a and 24b in FIG. 7 along thejoint lines 27 of FIG. 4.

Change room 10 is provided on the interior thereof with lavatory andtoilet facilities which will be described in more detail hereinafter.Change room 10 also has mounted beneath the lloor 24 a ponto-onstructure general- 1y indicated at. 2S, the details of which will alsobe described' later, which permits the change room to be elevated to anabove-ground position as shown in FIG. 1 by hydraulic ilotation by meansof water introduced into the well generally indicated at 26, the changeroom being retractably movable into the well to a position shown in FIG.3 when water is withdrawn from the well 26 as will be describedhereinafter.

Well 26 is of concrete construction and includes four bounding walls 28,30, 32, and 34 which are respectively parallel to walls 12, 18, 20, and22 of the change room. A retaining wall 35 formed of redwood or othersuitable material extends around the upper end of well 26. The depth ofthe well 26 is such that the change room may be moved to a completelyretracted position as shown in FIG. 3 in which the at roof 24 of thechange room is flush with the ground surface or with the decking 36 ofthe swimming pool and completely covers the well opening.

As best seen in the view of FIG. 5, the roof 24 of the change room mayhave aixed thereto tlagstone 37, plantings, or the like, to conform tothe appearance of the decking of the swimming pool, or to the other areasurrounding the change room installation, so that when the change roomis in retracted position, the roof 24 otI the change room blendsimperceptibly into the pattern of the surrounding decking 36 or into thesurrounding landscape. In fact when the excavation is made for well 26,a suitable section of the swimming pool decking may be removed bycutting with cement cutting saws, and saving the cut section forreplacement later on the roof 24 of the change room. The opposite endwalls 20 and 22 of the change room are provided with verticallyextending male guide members both indicated at 38 and the correspondingwalls 28 and 30 of well 26 have female guide members, both indicated at40, projecting inwardly to receive the male guide members 3S. Thecooperating guide members 38 and 40 guide the change room 10 and itsattached pontoon structure 25 during its vertical elevating orretracting movement to be described.

The lateral dimensions of each of the walls or sides 12, 18, 20, 22 ofchange room 10 are less than the lateral dimensions of the correspondingwalls of well 26, and in order to` bridge the space between the changeroom and the adjacent decking of swimming pool 26 when change room 10 isin elevated position, foot boards 42 are suitably connected by hinges 44to the surfaces of each of 'the walls of the change room as best seen inthe views of FIGS. 1 yand 2. When the change room is in its retractedposition within the well, hinge boards 42 are suitably secured in raisedposition by the toe 47 of pivoted locking levers 46 which are raised tolie in a substantially horizontal plane to retain their correspondinghinge boards 42 in elevated inoperative position. When the change roomis in its elevated position as shown in the views of FIGS. 1 and 2, sideboards 42 are moved downwardly to a horizontal position in which theouter edges of the side boards rest on the decking 36 of the swimmingpool.

As best seen in the views of FIGS. 1 and 2, pivoted locking levers 46are swingably movable downwardly about their respective pivotal axes 48into locking engagement with the upper surface of the footboards toretain the footboards in the horizontal position shown in FIGS. 1 and 2while the change room is in elevated position.

As best seen in the view of FIG. 8, the various walls of the change roominclude a studding framework 21, an exterior panelling 21a, and aninterior panelling 2lb. Suitable slots 21C are provided in the interiorpanels 2lb to facilitate the addition of weights such as lead shot inthe hollow wall space to facilitate the final balancing of the changeroom to secure proper flotation thereof. The exterior wall panels 21aare constructed of light weight panel materials of the type employed inthe construction of house trailers, using colorful exterior panels.

The inte-rior arrangement of change room 10 is best understood byreference to the views of FIGS. 3 and 4. A toilet bowl 52 is mounted onfloor 59, and a water closet 54 for bowl 52 is mounted on the adjacentrear wall 18 of the change room. A washbowl 56 is also mounted on rearwall 18 of the change room. A second water closet 58 is mounted on wall18 and is connected by pipe 88 to the discharge pipe 74 leading fromsewage pump 70, to be described hereinafter. Auxiliary water closet 58may be discharged to provide a force flushing of ilexible sewage pipes75 and 90 as will be described hereinafter. A mirror 60 is mounted onwall 18 below water closet 58. A bench 61 may be supported on the oor ofthe change room. A shower stall generally indicated at 62 having ashower head 63, and provided with a iioor of tile or other suitablematerial, is also positioned in change room 10 in the corner formed byrear wall 18 and right end wall 22. Water closets 54 and 58, washbowl56, and the shower head 63 are all suitably connected to cold water line112 by branch line 112a which is connected to a permanent fitting in thewell wall. Wash bowl S6 and shower head 63 are also connected to hotwater line 115, which is an insulated line extending underground fromthe nearest hot water heater to a permanent connection in the wellwalll, Suitable exible conduits are provid-ed between the permanent hotand cold water connections in the well wall and the correspondingoutlets in the change room.

The pontoon assembly generally designated at 25 includes threevertically superposed independent pontoons 25a, 25b, and 25C,respectively. The uppermost pontoon 25a is located immediately beneaththe floor 24 of the change room and serves as a receiver for the sewagedischarged from toilet 52 and for the drain water from wash bowl 56 andshower stall 62. A discharge pipe 64 connects toilet bowl 52 to pontoon25a; a drain pipe 66 connects wash bowl 36 to pontoon 25a; and drainpipe 68 provides a drain connection from shower stall 62 to pontoon 25a.Formed or standard P traps may be used wherever necessary in theplumbing connections to prevent odors from backing up into the changeroom.

The intermediate pontoon 25b houses a sewage pump generally indicated at70 having an inlet pipe 72 which communicates with the interior ofpontoon 25a, whereby the sewage in pontoon 25a is drawn into the intakeof sewage pump 70. Sewage pump 70 is of the non-clogging type, havingcomparatively large openings between the vanes of its impeller. Thevanes of the pump are well rounded at their entrance ends to preventclogging with toilet tissue or by the sewage. Sewage pump 70 alsoincludes outlet pipe 74 through which pump 70 discharges to a flexibleduct 75 which may be made of tiexible rubber, plastic, or the like. Theopposite end of exible duct 75 is connected into a permanent outletfitting 76 in the wall of welll 26. Fitting 76 may be a short section ofstandard bell and spigot sewer pipe. The opposite end of bell and spigotfitting '76 is connected to a exible conduit 90 which, in turn, isconnected to the sewer stub-out which is usually located in front of theresidence. The liexible pipe is laid in a shallow trench about 6 inchesdeep in such manner as to have a gentle fall along its length, and ispermanently connected to the sewer stub-out. Pipe 90 may be of mediumdiameter, about 11/2-2 inches in diameter.

Pump 70 is driven by a suitable electrical motor which is connected toelectrical power by power lines 78 and 8) in series with a switch 82which is operated by a float member 84 which floats on the sewage inpontoon section 25a. When iioat 84 rises to a predetermined level, itactuates toggle switch 82. to close the electrical circuit of theelectrical motor which drives sewage pump 70. Switch 82 and ball oat 84are operatively connected together by a two-part connecting rodgenerally indicated at 86, including sections 86a and 8617 havingexternally threaded ends which are received in an internally threadedadjusting coupling 86e to permit adjustment of the total length of rod86. The upper end of upper rod section 86h is pivotally connected to alink 87 which, in turn, is pivotally connected to the actuating lever S9of toggle switch 82.

Connecting rod 86 extends from pontoon 25a through lloor 24 and into thechange room, since switch 82 is located in the change room at someposition such as the outer surface of the shower stall wall. Rod 86 isguided in its passage through floor 24 by a sleeve or bushing 99,preferably an expansion type bushing including a felt or sponge rubberbearing surface to prevent odors from pontoon 25a from rising up intothe change room. Bushing 99 is secured in position in the floor by asuitable clamp or sleeve 101 secured to the floor joist.

A drip type deodorant dispenser may be placed on the wall of the changeroom and so positioned that the contents of the dispenser drip into thepontoon 25a which receives the sewage.

Hydraulic flotation system for swimming pool change room As best seen inthe view of FIG. 4, the swimming pool change room is surrounded on allsides by a space generally indicated at 91 which defines a floodingregion to receive water between the walls of the well 26 and of thechange room for the llotation of the change room in the well.

Positioned in the corner' of the well 26 bounded by the left end wall 28and the rear wall 34 of the well, and extending for substantially theentire height of the Well is a removable housing 92 for the well pump94. A suitable electric motor 95 drives pump 94. Pump 94 includes aninlet pipe 97 which projects into the flooding region 91 of the well. Atthe lower end thereof, removable container 92 is provided with apin-like projection 96 which is received in the recess 98 in the bottomwall of Well 26. Container 92 is bolted to the rear wall 34 of the well.Pump 94 is provided with a discharge pipe 100 which is connected at itsupper end into a clean water discharge line 102. Line 102 may beconnected to an existing sprinkler system or garden sprayer so as toutilize the clean water discharged from the well by the pump 94. Asuitable control box generally indicated at 104 (FIG. 5) having a hingedcover 106 is located ilush with the ground surface and is generallysimilar to a conventional water meter housing. Control box 104 includesa control switch 10S connected in series with the electric power supplylines 109a, 10911 for electric motor 95 which drives well pump 94. Asuitable gate valve 110 is also positioned inside of control box 104 andis connected in the cold water inlet line 112 so that fresh cold wateris discharged into the llooding region 91 of the well when valve 110 isopened. A suitable padlock may be provided on control box 104 to insureagainst unauthorized opening ofthe control box.

Installation of change room In constructing the swimming pool changeroom, if the site selected for the change room is in the general area ofthe decking of the pool and is provided with llagstone or the like, asuitable section of the decking may be removed by cutting with cementcutting saws. The cut section may be saved for replacement on the changeroom roof later. The excavation necessary for the well is then dug andforms for the concrete walls of the well are placed in the excavation.Provision is made when casting the concrete walls for the variousplumbing and electrical outlets. Concrete is poured into the forms toform the walls of the well. The female guides 40 are suitably positionedprior to pouring of the concrete. Each half roof and half iloor sectionof the prefabricated change room and the walls of the change room arethen wheeled through the backyard gate. The sections of the change roomare then assembled and secured together by bolts,

nails, or screws, as desired. The exposed joints are caulked and coveredwith a suitable exterior trim to ready the change room for installationinto the concrete well 26. The interior forms of the well are thenremoved. Control box 104 is installed at a suitable location, and theelectric, water, and sewer lines are then installed at the properlocations in the walls of the well. The removable housing 92 for thewell pump 94 with the pump positioned therein is then installed andsecured to the rear wall of the well by bolts. Water is then admittedinto the well by opening valve in the cold water inlet line 112 to admitwater into the well. Change room 10 is then rolled up on planking overthe well, suspended from a tripod or other suitable device, and gentlylowered until the pontoon assembly 25 beneath the change room providesthe necessary flotation for the change room. Balancing for equal weightdistribution to maintain level floating of the change room would havebeen previously done during manufacture of the change room, but furtherbalancing may also be done at the site, if necessary. Flexible sewerpipe 75 and flexible hot and cold water lines are then connected to theproper fixtures of the change room 10 or its attached pontoon structure.Pump 94 in removable pump housing 92 is then started and change room 10is gently lowered as the level of water in the well lowers, until changeroom 10 finally reaches the position shown in FIG. 3 in which thelowermost pontoon 25e rests on the bottom of the well. The water whichis pumped out by pump 94 as the change room is lowered is put to auseful purpose by being run through the garden sprinkler system or thelike, which may be connected to the discharge line 102 to which pump 94is connected. With the change room 10 resting on the bottom of the well,the previously cut llagstone removed from the pool decking may then beinstalled on the root of the change room, or suitable plantings, or arock garden may be installed on roof 23 of the change room.

When in use by the owner, gate valve 110 in control box 104 is opened toilood the well, thereby raising the change room to the proper height.When the change room is elevated to the proper height, the gate valve isthen turned oil and foot boards 42 are let down about their hingedconnections and secured in position by locking levers 46. The changeroom may be left in its elevated position for as long a period asdesired. Guests could enter the change room, llush the toilet, use thewash basin, take a shower, and upon entrance of water or sewage intopontoon section 25a, the lloat S4 therein would be raised automaticallyturning on switch 82 to energize the electric motor which drives thenon-clogging sewage pump 70. Pump 70 continues pumping as long as thelevel of the sewage in pontoon 25a is suilicient to maintain float 84 insufficiently elevated position to maintain switch 82 actuated. As thesewage level falls in pontoon 25a, switch S2 controlling the motor ofsewage pump 70 is de-energized. As often as desired, the owner or userof change room 10 could activate the water closet 58 and discharge theWater therefrom through flexible sewage lines 75 and the connectedsewage line 90. The force of the water from water closet 58 tlushes thesewage lines 75 and 90 of any materials which might tend to clog theselines. This forced llushing action is of particular value in llushinglexible sewer pipe 90, which lays in a shallow trench and which has onlya relatively slight downward incline toward the stub-out of the mainsewer line which is usually located in the street in front of theresidence.

When it is desired to lower the change room 10 into the well, pump 94 isplaced in operation by energizing the electric pump motor 95. Pump 94pumps the water out of well 26, thereby causing change room 10 togradually drop to the bottom of well 26 to the position of FIG. 3 inwhich the roof 23 of the change room is tlush with the decking 36, orwith the ground surface. When the change room reaches its fullyretracted position, pump motor 95 is de-energized, either by manuallymoving the control switch for motor 95 to de-energize the motor, or byuse of a suitable limit switch which is actuated when the change roomreaches its fully retracted position.

It can be seen from the foregoing that there is provided in accordancewith this invention a change room for installation adjacent privateswimming pools and the like which has great utility and which permitsthe owner or guests using the swimming pool to change clothes, and touse the toilet, washing, and shower facilities provided by the changeroom without the necessity of entering the residence, therebyeliminating the tracking in of dirt, the dripping of water, and theinconvenience generally associated with the use of swimming pools.Furthermore, the retractable construction of the change room permits thechange room to be entirely retracted into an aesthetically pleasingout-of-sight position into its receiving well when the change room isnot in use. Furthermore use of shallow trench liexible sewer pipingeliminates the digging of deep sewer lines, and is inexpensive inmaterial cost and in installation. The sectionalized construction of thechange room also permits the sections of the change room to be wheeledthrough the average back yard gate and put together at the site desired.

While there has been shown and described a particular embodiment of theinvention, it will be obvious to those skilled in the art that variouschanges and modifications may be made therein without departing from theinvention and, therefore, it is aimed to cover all such changes andmodifications as fall within the true spirit and scope of the invention.

What is claimed is:

1. A change room and lavatory adapted to be located adjacent a swimmingpool or the like, comprising a walled enclosure adapted to float andhaving a roof thereon and including a doorway thereto, a well extendingbelow ground level, said enclosure being positioned in said well andvertically movable therein, said well including means withdrawing waterfrom said well, said Well and said enclosure being so dimensioned thatwhen said enclosure is fully retracted into Said well said roof issubstantially fiush with the ground surface, and means introducing waterinto said well for elevating said enclosure to a position in which atleast a substantial portion thereof projects above the ground level.

2. A change room and lavatory as defined in claim 1 in which saidenclosure and said well include cooperating guide means for insuringvertical movement of said enclosure.

3. A change room and lavatory as defined in claim 1 including toilet andwashing facilities therein, and exible water supply and sewage pipesconnecting said toilet and washing facilities to corresponding fixturesin the walls of said well.

4. A change room and lavatory as defined in claim 1 in which said walledenclosure is of prefabricated sectionalized construction adapted to beeasily transported to and assembled at the site of installation.

5. A change room and lavatory adapted to be located adjacent a swimmingpool of the type having a decking about the pool, comprising a walledenclosure adapted to float and having a roof thereon and including adoorway thereto, a well extending below the level of the decking of theswimming pool, said enclosure being positioned in said well andvertically movable therein, said well and said enclosure being sodimensioned that when water is withdrawn from said well, said enclosureis fully retracted into said well and said roof is substantially ushwith the swimming pool decking, and means introducing water into saidwell for elevating said enclosure to a position in which at least asubstantial portion thereof projects above the swimming pool decking.

6. A change room and lavatory adapted to be located adjacent a swimmingpool or the like, comprising a floatable walled enclosure having a baseand roof thereon and including a doorway thereto, a well extending belowground level, said oatable enclosure being positioned in said well andvertically movable therein, said well and said fioatable enclosure beingso dimensioned that when said enclosure is fully retracted into saidwell by means withdrawing water from said well, said roof issubstantially fiush with the ground surface, and means for elevatingsaid floatable enclosure by hydraulic flotation including introducingwater into said well to a position in which at least a substantialportion thereof projects above the ground level.

7. A change room and lavatory adapted to be located adjacent a swimmingpool or the like, comprising a walled enclosure having a roof thereonadapted to fioat and including a doorway thereto, a well extending belowground level, said enclosure being positioned in said well andvertically movable therein, said well and said enclosure being sodimensioned that when water in said well is withdrawn, said enclosure isfully retracted into said well and said roof is substantially flush withthe ground surface, pontoon means mounted on the undersurface of saidenclosure, and means for elevating said enclosure by hydraulic iiotationincluding introduction water into said well to a position in which atleast a substantial portion thereof projects above the ground level.

8. A change room and lavatory adapted to be located adjacent a swimmingpool or the like, comprising a walled enclosure having a roof thereonadapted to fioat and including a doorway thereto, a well extending belowground level, said enclosure being positioned in said well andvertically movable therein, said well and said enclosure being sodimensioned that when said enclosure is fully retracted into said wellupon the withdrawal of water from said well, said roof is substantiallyflush with the ground surface, means for admitting water into said wellfor elevating said enclosure by hydraulic flotation to a position inwhich at least a substantial portion thereof projects above the groundlevel, and means for withdrawing water from said well to cause saidenclosure to move to a fully retracted position in said well.

9. A change room and lavatory as defined in claim 8 including a pumpmeans mounted in said well for withdrawing water from said well, saidpump means being enclosed within a removable container, and meansremovably securing said container in said well.

10. A change room and lavatory adapted to be located adjacent a swimmingpool or the like, comprising a walled enclosure having a roof thereonand including a doorway thereto, a well extending below ground level,said enclosure being positioned in said well and vertically movabletherein, said well and said enclosure being so dimensioned that whensaid enclosure is fully retracted into said well said roof issubstantially fiush with the ground surface, pontoon means mounted onthe undersurface of said enclosure, said change room and lavatory havingtoilet and washing facilities therein, plumbing lines connecting saidtoilet and washing facilities to discharge into said pontoon means,exible sewage pipe means connecting said pontoon means to an outletfixed in a wall of said well, and means for elevating said enclosure byhydraulic flotation to a position in which at least a substantialportion thereof projects above the ground level.

11. A change room and lavatory as defined in claim 10 including sewagepump means mounted in said pontoon means, said sewage pump means beingconnected to said flexible sewage pipe means.

12. A change room and lavatory as defined in claim 10 including flexibleinlet water pipes connecting said toilet and washing facilities tocorresponding fixtures in the walls of said well.

13. A change room and lavatory as defined in claim 10 including anauxiliary flush tank positioned in said change room, and plumbing linemeans connecting said auxiliary ush tank to said flexible sewage pipemeans whereby to provide a force ilushing of said flexible sewage pipemeans.

14. A change room and lavatory as dened in claim 10 in which saidflexible sewage pipe means is connected to one end of a flexible sewerline, said flexible sewer line being installed in a shallow trench inthe ground and being connected at its opposite end to the main sewerline in the adjacent street or the like.

15. A change room and lavatory as defined in claim 14 including meansfor force flushing said exible sewage pipe and said exible sewer lineconnected thereto.

References Cited bythe Examiner UNITED STATES PATENTS 592,190 10/97 Bond50-100 3,008,435 11/61 Dupuy 109-1 OTHER REFERENCES Popular Sciencepublication: Building to Duck Underground, March 1954; p. 171, coply inGroup 470.

LEWIS J. LENNY, Primary Examiner.

SAMUEL ROTHBERG, Examiner.

1. A CHANGE ROOM AND LAVATORY ADAPTED TO BE LOCATED ADJACENT A SWIMMINGPOOL OR THE LIKE, COMPRISING A WALLED ENCLOSURE ADPATED TO FLOAT ANDHAVING A ROOF THEREON AND INCLUDING A DOORWAY THERETO, A WELL EXTENDINGBELOW GROUND LEVEL, SAID ENCLOSURE BEING POSITIONED IN SAID WELL ANDVERTICALLY MOVABLE THEREIN, SAID WELL INCLUDING MEANS WITHDRAWING WATERFROM SAID WELL, SAID WELL AND SAID WNCLOSURE BEING SO DIMENSIONED THATWHEN SAID ENCLOSURE IS FULLY RETRACTED INTO SAID WELL SAID ROOF ISSUBSTANTIALLY FLUSH WITH THE GROUND SURFACE, AND MEANS INTRODUCING WATERINTO SAID WELL FOR ELEVATING SAID ENCLOSURE TO A POSITION IN WHICH ATLEAST A SUBSTANTIAL PORTION THEREOF PROJECTS ABOVE THE GROUND LEVEL.